10.26.2011

Mapping the Performance

Part of the analysis phase is capturing the skills required for performance. While there are several methods for capturing these performance, ISD normally only lists Behavioral Task Analysis. However, many task are largely overt and nonprocedural in nature, thus they require a Cognitive Task Analysis. The solution of course is to simply plug the desired method or tool into the ISD or ADDIE model as it is quite dynamic rather than the stale linear model that some believe.

Four analysis tools will be discussed in this post that may be plugged into ISD:

Behavioral Task Analysis

Information Processing Analysis

GOMS Analysis

Critical Decision Method

Considerations for Analysis Tool Selection

Selecting the correct analysis tool is dependent on the type of actions the worker must perform. This performance is normally composed of two types of actions:

Overt - behavioral and observable

Covert - mental and not observable

While some some tasks are only composed of one or the other, more complex tasks may be composed of both actions.

In addition, the selection of the analysis tool is also dependent upon the task steps:

Procedural - the steps are performed in order and are normally largely overt actions

Rule Based - the steps do not have to be performed in a temporal order and are normally largely covert (cognitive) actions

Procedural Analysis Methods

These methods are used when there is a temporal order of involved steps, thus there is a set procedure for performing the task. Two analysis tools that fall under Procedural Analysis are Behavioral Task Analysis and Information Processing Analysis.

Behavioral Task Analysis

Behavioral Task Analysis is used to capture overt actions by observing and recording an Exemplary Practitioner perform the task. Questions may also asked to ensure the analyst has fully captured the performance. This is perhaps the easiest method. The output is a list of steps that may also have diagrams or pictures of the desired performance or behavior. A short example is:

Turn on computer and start spreadsheet application.

Load projected sales report spreadsheet template (prosale.exl).

Enter projected sales figures into designated spreadsheet cells.

Run spreadsheet macros.

Save file under new name, “pro***.exl”, with *** being the next sequential number For example, pro135.exl. Note: Do NOT overwrite template.

Forward to Planning Manager by email.

Exit application.

Depending upon the learners' prior knowledge and the complexity of the task, the list might also contain substeps as shown in this example:

Turn on computer

Start spreadsheet application

2.1 Click the Start icon

2.2 Scroll through the menu list and select the Excel application

Load projected sales report spreadsheet template (prosale.exl).

3.1 Click on the file menu

3.2 Click on the Open option

Etc., Etc.

Information Processing Analysis

This tool is used when there are both overt steps that require a set order and covert steps that require decision making of a yes or no nature. The overt actions are captured by observing and recording an expert performer, while the covert actions are captured by having the expert performer talk about their actions (thinking aloud). Capturing the decision making process makes it more difficult than the Behavioral Task Analysis, but it is perhaps the most common method as the majority of tasks require decisions. The output is commonly a flow chart composed of three elements that outline the task steps:

Boxes - overt or covert actions

Diamonds - decisions

Arrows - order of steps

A short example of a flowchart showing a decision a forklift operator must make when moving goods from the receiving dock to a storage area may look like this:

Rule Based Analysis Methods

These methods are used when there is NO temporal order of involved steps, thus there is not a set procedure for performing the task. In addition, most of the task steps are normally of a overt nature. Two tools that fall under Rule Based Analysis are GOMS Analysis and the Critical Decision Method.

GOMS Analysis

The GOMS tool analyzes a task by examining four elements of it:

Goals represents the intention to perform a task its underlying structures, such as subtasks, cognitive operations, and physical operations. For example, an Instructional Designer may have a task of selecting activities that will give a new sales person the skills to sell a product. That task includes subtasks of analyzing the skills needed, analyzing activities, etc. The ID will use cognitive operations, such as selecting an activity that actually teaches the skill and determining if the chosen media can effectively deliver the activity.

Operations represent the physical actions, such as binding a learner's manual or pressing a button. It also includes mental operations, such as retrieving from memory or setting a goal.

Methods represent sequences of operations that accomplish goals or objectives. It includes high-level goals that breaks a tasks into subtasks and low-level methods that are the actions that actually perform the subtasks.

Selections Rules represent the context for selecting a particular method. That is, there may be several ways to accomplish a goal or task, but one may be chosen because it should perform this particular task the best (heuristics).

Capturing the performance of a covert task can be done in many ways and normally several are used to capture the task. Some of the more common ones are interviews, job shadowing, having an expert performer think-aloud, and storytelling.

The GOMS analysis can normally best be represented by a concept or mind map. The Goals will normally be placed on the map first, which is then followed by placing the Methods and their Selection Rules on the map. The details (Operations) are then listed. Shown below is a partial mind map of selecting an analysis tool:

Depending upon the size and the scope of the task, you might have to link or reference other documents that go into more specifics about the Operations, Methods, and Selections rules. However, be careful as one of the common mistakes in GOMS analysis is getting too specific, which results in long and detailed procedural descriptions that are difficult to follow.

Critical Decision Method (CDM)

This can be thought of as a Case Study, however, it also includes a visual reference or map. Just as a case study uses an actual incident to tell a story, CDM is also performed by having an expert tell a story about a particular task they performed in the past. For example, an Instructional Designer might tell how he developed a Just-in-Time program for training sales persons to sell a new product or a fire fighter might tell about the actions she took in fighting a gas station fire. Note that when the person tells the story, the interviewer might have to probe to gather some details. While the output might include a case study, it should normally include a map similar to this:

The CDM process goes like this:

Sweep 1 - Identify a incident. It should come from a decision maker who was involved rather than a witness.

Sweep 2 - The expert tells his or her story. Identify the key decision points and when they were made.

Sweep 3 - These is where you “deepen” the interview by asking for analogs, mental models, other options, experience or training that was helpful, etc.

Sweep 4 - Finally ask “What If” questions, such as “If the situation had been different what would have happened?”, or “What if a novice had been in charge?”

Key Points

The finale outputs, such as a list of task steps, flowchart, mind map, or CDM chart prove not only invaluable to the the design team, but may also make excellent performance or learning aids. Just as it is as important to use a correct analysis tool, it is also just as import to represent the findings in a manner that others can understand.

The final output might not be just one chart, but rather a combination of them as shown in the picture at the top of this post. Also the chart does not have to be combined into one page if it gets too cluttered, but may rather be composed of a collection of documents that are linked together electronically or referenced if they are printed. In addition, other types of charts and visualizations representations may also be used.

Both Merriënboer and Crandall, Klein, & Hoffman's books are excellent references and provide different information about Cognitive Task Analysis, however, Merriënboer's is now out of print, thus the used books may be a bit on the pricey side.

Thank you for your very well-organized and easy to implement thoughts on performance analysis. Your posting not only included descriptions of the various methods, but also helped me with great examples of how they might be used. I have just begun taking courses toward obtaining my Masters in Instructional Design and Technology. Finding the information in your blog will add to my knowledge and resource base.